A diverse collection of 22 interest groups has signed a new letter urging Congress to make cuts to the Defense Department on the scale of the sequester but to shift the cuts to different areas of the defense budget.

"We and other military experts believe we can realize savings of at least $50 billion to $100 billion per year over 10 years in the Pentagon budget -- without compromising national security," reads the letter, an early copy of which was obtained by The Washington Post. "In fact, such savings will make us safer since our security depends on a sound strategy and a strong economy."

Those signing the letter include conservative groups such as Americans for Tax Reform, the Council for Citizens Against Government Waste and the National Taxpayers Union, as well as left-leaning groups like the U.S. Public Interest Research Group (PIRG), Credo and Progressive Democrats of America.